2006 Mercedes R-Class Owner's Manual - Page 464

Practical hints Replacing SmartKey batteries Replacing SmartKey batteries If the batteries in the SmartKey or the SmartKey with KEYLESS-GO* are discharged, the vehicle can no longer be locked or unlocked. It is recommended to have the batteries replaced at an authorized Mercedes-Benz Light Truck Center. Warning! i When replacing batteries, make sure they are clean and free of lint. SmartKey Replacement batteries: Lithium, type CR 2025 or equivalent. Remove mechanical key 1 from the SmartKey ( page 459). i When replacing batteries, always replace both batteries. The required replacement batteries are available at any Mercedes-Benz Light Truck Center. G Keep the batteries out of reach of children. If a battery is swallowed, seek medical help immediately. Batteries contain materials that can harm the environment if disposed of improperly. Recycling of batteries is the preferred method of disposal. Many states require sellers of batteries to accept old batteries for recycling. 1 Mechanical key 2 Slide 3 Battery compartment Insert mechanical key 1 in side opening in direction of arrow. Using mechanical key 1, push gray slide 2 to unlatch battery compartment 3. 463